Richard dudgeon



R'. DUDGEON.' VPQRTABLB HYDRAULIG PRESS.

No. 8,203` Patented July 8, 1851.'

,m MM @www RICHARD nUDGEoN,Y or NEW YORK, Iv. Y.

PoRTARLE HYDRAULIC PRESS.

. Speccation of uietters` Patent No. 8,203, dated July 8, 1851. i

To all 'whom t may concern: i l

Beit known that I, RICHARD DUDGEoN,fof

the city of New York, State of New York,

(84 Willet street, New York,)A have invented a new and useful Hydraulic: Pressto do most of the screw.

j This press is to the eye a simplelcylinder of from three to five or more inches in `diameter, according to the power desired, with an enlarged head, having `an `opening. for the reception of the lever by which the pis-` ton of the pump is worked. This cylinder,

`with its enlargement, contains justso much of water or other iuid as is required toflll `the vacancyrcaused by the raising of the interior. shaft in the act of lifting, and when 4 this is accomplished, the water is returned into its original recess by a valve operated by the lever that works the pump. The press is portable. And` I do hereby'declare that the following is afull and exact `description of the construction and operation of the same, reference being had tothe an` neXed drawings, making a part ofthis specification.

Figure 1. In this ligure B is the head of the ram made of iron and hollow, so that its capacity together with the ram Gr, is equal to the cylinder D. E, is the bottom of the cylinder screwed on as seen in Fig. 2, and F, is the stuiing-box on the top of the cylinder to steady the ram G, and also to bean additional safeguard against any leak which might arise from imperfection in the cylin- `der D, and is screwed on in the same man-- ner. A, is the end of the socket to receive the force-pump' handle.` j I, is a small projection upon the head of the ram through which a pin passes, which forms one of the joints for the parallel motion of the forcepump-rod seen in Fig. 2.

Figure 2. The valve seat a is screwed on to the end of the ram G and also acts` as a follower to keep the packingml a against the work now performed fby the i end of the ram. The valve c allows the water to be forced through the passages eZ d intothe cylinder and shuts when the pump piston e ascends'and thefvalve i, inthe pump piston is exactly the same, only that it `has its passages Z d larger to allow the pump to l `fill readily. Through its stem the rod g `passesand,` by depressinguthe handle Aor `socket A tofitslowest limit it will be* seen that it opens the valve rand it` again opens lthe valvec and allows the water to return.`

into lthe ram.` The packing n, n, on `the force-pump-piston is the sameas on the end of the ram and is held to its place by the 4follower 0. The center of thehead through which the pump rod and rod to workjthe` valves passes has a stuffing-box on the inside of the head as seen on Fig. 2. The joint t is an ordinary knuckle-joint to connect the pump rod with the socket to receive the handle and the joint at s is the same kind of joint. Thehead ofthe ram is fastened or secured to the ram by the screws r, 1".

These portable hydraulic presses can be and are made of iron or any other metal. What I claim as my invention and desire to secure by Letters Patent is- An hydraulic press `quite portable in which the ram is hollow and serves as the reservoir to supply the cylinder with water or other1 liquid, while the force-pump and its appendages are contained within the ram, so that by working this force-pump the ram is forced up until the liquid in such ram is exhausted and `by moving the handle of the pump down it will come In contact with a rod attached to a valve inthe pump piston and the latter comes in contact with a valve in the end of the ram opening them both and allowing the water to return into the ram again through passages. RICHARD DUDGEON. Witnesses: CHARLES EDWARDS, TIIoMAs HINwooD. 

